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Finding the Fourth Proportional to 87,349.77, 130,931.21 and 45,187.40

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Solution

The fourth proportional to 87,349.77, 130,931.21 and 45,187.40 is: 67,732.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,349.77 : 130,931.21 = 45,187.40 : x
  2. Step 2: Convert to fraction form
    87,349.77/130,931.21 = 45,187.40/x
  3. Step 3: Cross multiply
    87,349.77x = 130,931.21 × 45,187.40
  4. Step 4: Simplify right side
    87,349.77x = 5,916,441,399.05
  5. Step 5: Solve for x
    x = 5,916,441,399.05/87,349.77
  6. Step 6: Final answer
    x = 67,732.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.